feat(mall): classic B2B2C PC storefront with fixed mock API layer

- Mock adapter implementing @vmall/shared ApiClient (localStorage-persisted
  cart/orders/invoices), runtime switch via mockApi flag (default on)
- Fixed bilingual mock catalog: 3-level categories, 24 products w/ SKUs,
  stores, brands, banners, floors, seckill/collective/integral, comments,
  coupons, addresses, seeded orders/shipments/invoices
- B2B2C mall shell: top bar, logo/search/cart header, dark nav + category
  mega-menu, value-prop footer, back-to-top; 1200px grid, #ca151e theme
- UI primitives replacing element-plus: carousel, pagination, breadcrumb,
  qty stepper, rating stars, modal, tabs, step bar, product card
- Pages: home floors, search (filters/sort/paging), goods detail (SKU
  picker, store rail, review tabs), cart -> checkout -> pay -> success,
  auth pages, user center (dashboard/orders/addresses/favorites/coupons/
  invoices), stores, seckill, collective, integral
- i18n split into per-domain locale modules (en+zh)
- OpenSpec change mall-pc-storefront-replica archived; all specs green

apps/mall/locales/auth.ts

@@ -0,0 +1,72 @@
+export default {
+  en: {
+    auth: {
+      loginTitle: "Account sign in",
+      registerTitle: "Create account",
+      forgotTitle: "Reset password",
+      loginTab: "Account sign in",
+      registerTab: "Create account",
+      forgotTab: "Forgot password",
+      emailPlaceholder: "Enter your email",
+      passwordPlaceholder: "Enter your password",
+      newPassword: "New password",
+      displayNamePlaceholder: "Enter your display name",
+      confirmPassword: "Confirm password",
+      confirmPasswordPlaceholder: "Enter your password again",
+      smsCode: "Verification code",
+      smsCodePlaceholder: "Enter the code",
+      getCode: "Get code",
+      codeCountdown: "Retry in {n}s",
+      loginAction: "Sign in",
+      registerAction: "Create account",
+      resetAction: "Reset password",
+      forgotPassword: "Forgot password?",
+      noAccount: "Don't have an account?",
+      haveAccount: "Already have an account?",
+      registerNow: "Create one now",
+      loginNow: "Sign in now",
+      resetSuccess: "Password reset",
+      resetSuccessHint: "Your password has been reset. Sign in with your new password.",
+      validationRequired: "Please complete all required fields.",
+      validationEmail: "Enter a valid email address.",
+      validationPassword: "Password must be at least 6 characters.",
+      validationMismatch: "Passwords do not match.",
+      requestFailed: "Unable to complete this request. Please try again.",
+    },
+  },
+  zh: {
+    auth: {
+      loginTitle: "账号登录",
+      registerTitle: "注册账号",
+      forgotTitle: "忘记密码",
+      loginTab: "账号登录",
+      registerTab: "注册账号",
+      forgotTab: "忘记密码",
+      emailPlaceholder: "请输入邮箱",
+      passwordPlaceholder: "请输入密码",
+      newPassword: "新密码",
+      displayNamePlaceholder: "请输入昵称",
+      confirmPassword: "确认密码",
+      confirmPasswordPlaceholder: "请再次输入密码",
+      smsCode: "验证码",
+      smsCodePlaceholder: "请输入验证码",
+      getCode: "获取验证码",
+      codeCountdown: "{n} 秒后重试",
+      loginAction: "登录",
+      registerAction: "注册",
+      resetAction: "重置密码",
+      forgotPassword: "忘记密码？",
+      noAccount: "还没有账号？",
+      haveAccount: "已有账号？",
+      registerNow: "立即注册",
+      loginNow: "立即登录",
+      resetSuccess: "密码重置成功",
+      resetSuccessHint: "您的密码已重置，请使用新密码登录。",
+      validationRequired: "请填写所有必填项。",
+      validationEmail: "请输入有效的邮箱地址。",
+      validationPassword: "密码至少需要 6 位。",
+      validationMismatch: "两次输入的密码不一致。",
+      requestFailed: "操作失败，请稍后重试。",
+    },
+  },
+};